American Spring LIVE: Episode 1 - Birth and Rebirth

Have you ever noticed that birds seem to get louder and sing more during the spring season? Well, you're not imagining things. Birdsong is a key indicator of the spring season, as more migratory birds return to their homes to mate.

The Egg: Life’s Perfect Invention

This little goldcrest may not be big enough to cover all her eggs, but thanks to a unique technique she can still keep them warm. The secret to her success can only be revealed through thermal cameras and has been caught on film for the very first time.